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Stop overriding InputView.dispatchTouchEvent

Browse source 
Bug: 11721001
Bug: 11976254
Change-Id: I950f13ec4084da7fd9c1c25fd7abed1e5d31ed4c
This commit is contained in:
Tadashi G. Takaoka 2014-02-17 17:36:34 +09:00
parent 891e4860f8
commit 5cd732f8c5
1 changed files with 62 additions and 55 deletions
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117
java/src/com/android/inputmethod/latin/InputView.java
View file

@ -31,6 +31,7 @@ public final class InputView extends LinearLayout {
private final Rect mInputViewRect = new Rect();
private KeyboardTopPaddingForwarder mKeyboardTopPaddingForwarder;
private MoreSuggestionsViewCanceler mMoreSuggestionsViewCanceler;
private MotionEventForwarder<?, ?> mActiveForwarder;
public InputView(final Context context, final AttributeSet attrs) {
super(context, attrs, 0);
@ -53,42 +54,62 @@ public final class InputView extends LinearLayout {
}
@Override
public boolean dispatchTouchEvent(final MotionEvent me) {
public boolean onInterceptTouchEvent(final MotionEvent me) {
final Rect rect = mInputViewRect;
getGlobalVisibleRect(rect);
final int x = (int)me.getX() + rect.left;
final int y = (int)me.getY() + rect.top;
final int index = me.getActionIndex();
final int x = (int)me.getX(index) + rect.left;
final int y = (int)me.getY(index) + rect.top;
// The touch events that hit the top padding of keyboard should be
// forwarded to {@link SuggestionStripView}.
if (mKeyboardTopPaddingForwarder.dispatchTouchEvent(x, y, me)) {
// The touch events that hit the top padding of keyboard should be forwarded to
// {@link SuggestionStripView}.
if (mKeyboardTopPaddingForwarder.onInterceptTouchEvent(x, y, me)) {
mActiveForwarder = mKeyboardTopPaddingForwarder;
return true;
}
// To cancel {@link MoreSuggestionsView}, we should intercept a touch event to
// {@link MainKeyboardView} and dismiss the {@link MoreSuggestionsView}.
if (mMoreSuggestionsViewCanceler.dispatchTouchEvent(x, y, me)) {
if (mMoreSuggestionsViewCanceler.onInterceptTouchEvent(x, y, me)) {
mActiveForwarder = mMoreSuggestionsViewCanceler;
return true;
}
return super.dispatchTouchEvent(me);
mActiveForwarder = null;
return false;
}
@Override
public boolean onTouchEvent(final MotionEvent me) {
if (mActiveForwarder == null) {
return super.onTouchEvent(me);
}
final Rect rect = mInputViewRect;
getGlobalVisibleRect(rect);
final int index = me.getActionIndex();
final int x = (int)me.getX(index) + rect.left;
final int y = (int)me.getY(index) + rect.top;
return mActiveForwarder.onTouchEvent(x, y, me);
}
/**
* This class forwards series of {@link MotionEvent}s from <code>Forwarder</code> view to
* <code>Receiver</code> view.
* This class forwards series of {@link MotionEvent}s from <code>SenderView</code> to
* <code>ReceiverView</code>.
*
* @param <Sender> a {@link View} that may send a {@link MotionEvent} to <Receiver>.
* @param <Receiver> a {@link View} that receives forwarded {@link MotionEvent} from
* <Forwarder>.
* @param <SenderView> a {@link View} that may send a {@link MotionEvent} to <ReceiverView>.
* @param <ReceiverView> a {@link View} that receives forwarded {@link MotionEvent} from
* <SenderView>.
*/
private static abstract class MotionEventForwarder<Sender extends View, Receiver extends View> {
protected final Sender mSenderView;
protected final Receiver mReceiverView;
private static abstract class
MotionEventForwarder<SenderView extends View, ReceiverView extends View> {
protected final SenderView mSenderView;
protected final ReceiverView mReceiverView;
private boolean mIsForwardingEvent;
protected final Rect mEventSendingRect = new Rect();
protected final Rect mEventReceivingRect = new Rect();
public MotionEventForwarder(final Sender senderView, final Receiver receiverView) {
public MotionEventForwarder(final SenderView senderView, final ReceiverView receiverView) {
mSenderView = senderView;
mReceiverView = receiverView;
}
@ -96,12 +117,12 @@ public final class InputView extends LinearLayout {
// Return true if a touch event of global coordinate x, y needs to be forwarded.
protected abstract boolean needsToForward(final int x, final int y);
// Translate global x-coordinate to <code>Receiver</code> local coordinate.
// Translate global x-coordinate to <code>ReceiverView</code> local coordinate.
protected int translateX(final int x) {
return x - mEventReceivingRect.left;
}
// Translate global y-coordinate to <code>Receiver</code> local coordinate.
// Translate global y-coordinate to <code>ReceiverView</code> local coordinate.
protected int translateY(final int y) {
return y - mEventReceivingRect.top;
}
@ -109,49 +130,36 @@ public final class InputView extends LinearLayout {
// Callback when a {@link MotionEvent} is forwarded.
protected void onForwardingEvent(final MotionEvent me) {}
// Dispatches a {@link MotioneEvent} to <code>Receiver</code> if needed and returns true.
// Otherwise returns false.
public boolean dispatchTouchEvent(final int x, final int y, final MotionEvent me) {
// Forwards a {link MotionEvent} only if both <code>Sender</code> and
// <code>Receiver</code> are visible.
// Returns true if a {@link MotionEvent} is needed to be forwarded to
// <code>ReceiverView</code>. Otherwise returns false.
public boolean onInterceptTouchEvent(final int x, final int y, final MotionEvent me) {
// Forwards a {link MotionEvent} only if both <code>SenderView</code> and
// <code>ReceiverView</code> are visible.
if (mSenderView.getVisibility() != View.VISIBLE ||
mReceiverView.getVisibility() != View.VISIBLE) {
return false;
}
final Rect sendingRect = mEventSendingRect;
mSenderView.getGlobalVisibleRect(sendingRect);
if (!mIsForwardingEvent && !sendingRect.contains(x, y)) {
mSenderView.getGlobalVisibleRect(mEventSendingRect);
if (!mEventSendingRect.contains(x, y)) {
return false;
}
boolean shouldForwardToReceiver = false;
switch (me.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
// If the down event happens in the forwarding area, successive {@link MotionEvent}s
// should be forwarded.
if (me.getActionMasked() == MotionEvent.ACTION_DOWN) {
// If the down event happens in the forwarding area, successive
// {@link MotionEvent}s should be forwarded to <code>ReceiverView</code>.
if (needsToForward(x, y)) {
mIsForwardingEvent = true;
shouldForwardToReceiver = true;
return true;
}
break;
case MotionEvent.ACTION_MOVE:
shouldForwardToReceiver = mIsForwardingEvent;
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
shouldForwardToReceiver = mIsForwardingEvent;
mIsForwardingEvent = false;
break;
}
if (!shouldForwardToReceiver) {
return false;
}
return false;
}
final Rect receivingRect = mEventReceivingRect;
mReceiverView.getGlobalVisibleRect(receivingRect);
// Translate global coordinates to <code>Receiver</code> local coordinates.
// Returns true if a {@link MotionEvent} is forwarded to <code>ReceiverView</code>.
// Otherwise returns false.
public boolean onTouchEvent(final int x, final int y, final MotionEvent me) {
mReceiverView.getGlobalVisibleRect(mEventReceivingRect);
// Translate global coordinates to <code>ReceiverView</code> local coordinates.
me.setLocation(translateX(x), translateY(y));
mReceiverView.dispatchTouchEvent(me);
onForwardingEvent(me);
@ -189,8 +197,7 @@ public final class InputView extends LinearLayout {
protected int translateY(final int y) {
final int translatedY = super.translateY(y);
if (isInKeyboardTopPadding(y)) {
// The forwarded event should have coordinates that are inside of
// the target.
// The forwarded event should have coordinates that are inside of the target.
return Math.min(translatedY, mEventReceivingRect.height() - 1);
}
return translatedY;
@ -200,8 +207,8 @@ public final class InputView extends LinearLayout {
/**
* This class forwards {@link MotionEvent}s happened in the {@link MainKeyboardView} to
* {@link SuggestionStripView} when the {@link MoreSuggestionsView} is showing.
* {@link SuggestionStripView} dismisses {@link MoreSuggestionsView} when it receives those
* events.
* {@link SuggestionStripView} dismisses {@link MoreSuggestionsView} when it receives any event
* outside of it.
*/
private static class MoreSuggestionsViewCanceler
extends MotionEventForwarder<MainKeyboardView, SuggestionStripView> {